{"id":10021044,"date":"2025-10-23T20:24:21","date_gmt":"2025-10-23T12:24:21","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021044"},"modified":"2025-10-23T20:24:21","modified_gmt":"2025-10-23T12:24:21","slug":"%e4%bb%8e%e4%b8%80%e6%ac%a1%e5%90%af%e5%8a%a8%e5%a4%b1%e8%b4%a5%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90%ef%bc%9aspring%e5%be%aa%e7%8e%af%e4%be%9d%e8%b5%96%e7%9a%84%e7%9c%9f%e7%9b%b8%ef%bd%9c%e5%be%97","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021044","title":{"rendered":"\u4ece\u4e00\u6b21\u542f\u52a8\u5931\u8d25\u6df1\u5165\u5256\u6790\uff1aSpring\u5faa\u73af\u4f9d\u8d56\u7684\u771f\u76f8\uff5c\u5f97\u7269\u6280\u672f"},"content":{"rendered":"<h2>\u4e00\u3001\u80cc \u666f<\/h2>\n<p>\u9884\u53d1\u73af\u5883\u4e00\u4e2a\u540e\u53f0\u670d\u52a1admin\u7a81\u7136\u542f\u52a8\u5931\u8d25\uff0c\u5f02\u5e38\u5982\u4e0b\uff1a<\/p>\n<pre><code>\n\norg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name\u00a0'timeoutNotifyController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name\u00a0'spuCheckDomainServiceImpl': Bean with name\u00a0'spuCheckDomainServiceImpl'\u00a0has been injected into other beans [...] in its raw version as part of a circular reference, but has eventually been wrapped. This means that said other beans do not use the final version of the bean. This is often the result of over-eager type matching - consider using\u00a0'getBeanNamesOfType'\u00a0with the\u00a0'allowEagerInit'\u00a0flag turned off, for example.\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:598)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:376)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1404)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:847)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)\n\u00a0 \u00a0 \u00a0 \u00a0 at com.shizhuang.duapp.commodity.interfaces.admin.CommodityAdminApplication.main(CommodityAdminApplication.java:100)\n\u00a0 \u00a0 \u00a0 \u00a0 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\u00a0 \u00a0 \u00a0 \u00a0 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\u00a0 \u00a0 \u00a0 \u00a0 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\u00a0 \u00a0 \u00a0 \u00a0 at java.lang.reflect.Method.invoke(Method.java:498)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.loader.Launcher.launch(Launcher.java:51)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:578)<\/code><\/pre>\n<p>\u9519\u8bef\u65e5\u5fd7\u4e2d\u660e\u786e\u5199\u9053\uff1a\u201c<strong>Bean has been injected into other beans &#8230; in its raw version as part of a circular reference, but has eventually been wrapped.<\/strong> \u201d\u8fd9\u4e0d\u4ec5\u4ec5\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5faa\u73af\u4f9d\u8d56\u9519\u8bef\u3002\u5b83\u63ed\u793a\u4e86\u4e00\u4e2a\u66f4\u6df1\u5c42\u6b21\u7684\u95ee\u9898\uff1a\u5f53\u5faa\u73af\u4f9d\u8d56\u9047\u4e0aSpring\u7684AOP\u4ee3\u7406\uff08\u5982@Transactional\u4e8b\u52a1\u3001\u81ea\u5b9a\u4e49\u5207\u9762\u7b49\uff09\uff0cSpring\u5728\u89e3\u51b3\u4f9d\u8d56\u7684\u65f6\uff0c\u4e0d\u5f97\u5df2\u5c06\u4e00\u4e2a\u201c\u534a\u6210\u54c1\u201d\uff08\u539f\u59cbBean\uff09\u6ce8\u5165\u7ed9\u4e86\u5176\u4ed630\u591a\u4e2aBean\u3002\u800c\u5f53\u8fd9\u4e2a\u201c\u534a\u6210\u54c1\u201d\u6700\u7ec8\u88ab\u201c\u5305\u88c5\u201d\uff08\u4ee3\u7406\uff09\u6210\u201c\u6210\u54c1\u201d\u65f6\uff0c\u5148\u524d\u90a3\u4e9b\u6301\u6709\u201c\u534a\u6210\u54c1\u201d\u5f15\u7528\u7684Bean\u4eec\uff0c\u4f7f\u7528\u7684\u5374\u662f\u4e00\u4e2a\u9519\u8bef\u7684\u7248\u672c\u3002<\/p>\n<p>\u8fd9\u5c31\u50cf\u5728\u7ec4\u88c5\u4e00\u4e2a\u7cbe\u5bc6\u673a\u5668\u65f6\uff0c\u4f60\u628a\u4e00\u4e2a\u672a\u7ecf\u8d28\u68c0\u7684\u96f6\u4ef6\u63d0\u524d\u88c5\u4e86\u8fdb\u53bb\uff0c\u7b49\u8d28\u68c0\u5b8c\u6210\u540e\uff0c\u673a\u5668\u91cc\u6df7\u7528\u7740\u65b0\u65e7\u7248\u672c\u7684\u96f6\u4ef6\uff0c\u6700\u7ec8\u7684\u5d29\u6e83\u4e5f\u5c31\u4e0d\u53ef\u907f\u514d\u3002<\/p>\n<p>\u672c\u7bc7\u6587\u7ae0\u5c06\u5e26\u4f60\u4e00\u8d77\uff1a<\/p>\n<ul>\n<li>\u719f\u6089spring\u5bb9\u5668\u7684\u5faa\u73af\u4f9d\u8d56\u4ee5\u53caSpring\u5bb9\u5668\u5982\u4f55\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\uff0c\u521b\u5efabean\u76f8\u5173\u7684\u6d41\u7a0b\u3002<\/li>\n<li>\u6df1\u5165\u89e3\u8bfb\u8fd9\u6761\u590d\u6742\u9519\u8bef\u65e5\u5fd7\u80cc\u540e\u7684\u6bcf\u4e00\u4e2a\u5173\u952e\u7ebf\u7d22\uff1b<\/li>\n<li>\u63d0\u4f9b\u7d27\u6025\u6b62\u8840\u65b9\u6848\uff1b<\/li>\n<li>\u5206\u4eab\u5982\u4f55\u4ece\u67b6\u6784\u8bbe\u8ba1\u4e0a\u907f\u514d\u6b64\u7c7b\u95ee\u9898\u7684\u5b9e\u8df5\u5fc3\u5f97\u3002<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u76f8\u5173\u77e5\u8bc6\u70b9\u7b80\u4ecb<\/h2>\n<h2>2.1 \u5faa\u73af\u4f9d\u8d56<\/h2>\n<p><strong>\u4ec0\u4e48\u662fBean\u5faa\u73af\u4f9d\u8d56\uff1f<\/strong><\/p>\n<p>\u5faa\u73af\u4f9d\u8d56\uff1a\u8bf4\u767d\u662f\u4e00\u4e2a\u6216\u591a\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u4e4b\u95f4\u5b58\u5728\u76f4\u63a5\u6216\u95f4\u63a5\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u8fd9\u79cd\u4f9d\u8d56\u5173\u7cfb\u6784\u6210\u4e86\u6784\u6210\u4e00\u4e2a\u73af\u5f62\u8c03\u7528\uff0c\u4e3b\u8981\u6709\u5982\u4e0b\u51e0\u79cd\u60c5\u51b5\u3002<\/p>\n<p>\u7b2c\u4e00\u79cd\u60c5\u51b5\uff1a\u81ea\u5df1\u4f9d\u8d56\u81ea\u5df1\u7684\u76f4\u63a5\u4f9d\u8d56<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"456\" height=\"274\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN74\" alt=\"image.png\" title=\"image.png\"><\/p>\n<p>\u7b2c\u4e8c\u79cd\u60c5\u51b5\uff1a\u4e24\u4e2a\u5bf9\u8c61\u4e4b\u95f4\u7684\u76f4\u63a5\u4f9d\u8d56<\/p>\n<p><img decoding=\"async\" width=\"732\" height=\"416\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8m\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u524d\u9762\u4e24\u79cd\u60c5\u51b5\u7684\u76f4\u63a5\u5faa\u73af\u4f9d\u8d56\u6bd4\u8f83\u76f4\u89c2\uff0c\u975e\u5e38\u597d\u8bc6\u522b\uff0c\u4f46\u662f\u7b2c\u4e09\u79cd\u95f4\u63a5\u5faa\u73af\u4f9d\u8d56\u7684\u60c5\u51b5\u6709\u65f6\u5019\u56e0\u4e3a\u4e1a\u52a1\u4ee3\u7801\u8c03\u7528\u5c42\u7ea7\u5f88\u6df1\uff0c\u4e0d\u5bb9\u6613\u8bc6\u522b\u51fa\u6765\u3002<\/p>\n<p><strong>\u5faa\u73af\u4f9d\u8d56\u573a\u666f<\/strong><\/p>\n<p><strong>\u6784\u9020\u5668\u6ce8\u5165\u5faa\u73af\u4f9d\u8d56\uff1a<\/strong><\/p>\n<pre><code>@Service\npublic\u00a0class\u00a0A\u00a0{public\u00a0A(B b) {}}\n@Service\npublic\u00a0class\u00a0B\u00a0{public\u00a0B(A a) {}}<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a\u9879\u76ee\u542f\u52a8\u5931\u8d25\u629b\u51fa\u5f02\u5e38BeanCurrentlyInCreationException<\/p>\n<pre><code>Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name\u00a0'a': Requested bean is currently in creation: Is there an unresolvable circular reference?\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.beforeSingletonCreation(DefaultSingletonBeanRegistry.java:339)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:215)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)<\/code><\/pre>\n<p>\u6784\u9020\u5668\u6ce8\u5165\u6784\u6210\u7684\u5faa\u73af\u4f9d\u8d56\uff0c\u6b64\u79cd\u5faa\u73af\u4f9d\u8d56\u65b9\u5f0f\u65e0\u8bba\u662fSingleton\u6a21\u5f0f\u8fd8\u662fprototype\u6a21\u5f0f\u90fd\u662f\u65e0\u6cd5\u89e3\u51b3\u7684\uff0c\u53ea\u80fd\u629b\u51faBeanCurrentlyInCreationException\u5f02\u5e38\u8868\u793a\u5faa\u73af\u4f9d\u8d56\u3002\u539f\u56e0\u662fSpring\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u4f9d\u9760\u7684\u662fBean\u7684\u201c\u4e2d\u95f4\u6001\u201d\u8fd9\u4e2a\u6982\u5ff5\uff0c\u800c\u4e2d\u95f4\u6001\u6307\u7684\u662f\u5df2\u7ecf\u5b9e\u4f8b\u5316\uff0c\u4f46\u8fd8\u6ca1\u521d\u59cb\u5316\u7684\u72b6\u6001\u3002\u800c\u5b8c\u6210\u5b9e\u4f8b\u5316\u9700\u8981\u8c03\u7528\u6784\u9020\u5668\uff0c\u6240\u4ee5\u6784\u9020\u5668\u7684\u5faa\u73af\u4f9d\u8d56\u65e0\u6cd5\u89e3\u51b3\u3002<\/p>\n<p><strong>Singleton\u6a21\u5f0ffield\u5c5e\u6027\u6ce8\u5165\uff08setter\u65b9\u6cd5\u6ce8\u5165\uff09\u5faa\u73af\u4f9d\u8d56\uff1a<\/strong><\/p>\n<p><strong>\u8fd9\u79cd\u65b9\u5f0f\u662f\u6211\u4eec\u6700\u4e3a\u5e38\u7528\u7684\u4f9d\u8d56\u6ce8\u5165\u65b9\u5f0f\uff1a<\/strong><\/p>\n<pre><code>@Service\npublic\u00a0class\u00a0A\u00a0{\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0B b;\n\u00a0 \u00a0 }\n@Service\npublic\u00a0class\u00a0B\u00a0{\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0A a;\n\u00a0 \u00a0 }<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a\u9879\u76ee\u542f\u52a8\u6210\u529f\uff0c\u6b63\u5e38\u8fd0\u884c<\/p>\n<p><strong>prototype field\u5c5e\u6027\u6ce8\u5165\u5faa\u73af\u4f9d\u8d56\uff1a<\/strong><\/p>\n<p><strong>prototype\u5728\u5e73\u65f6\u4f7f\u7528\u60c5\u51b5\u8f83\u5c11\uff0c\u4f46\u662f\u4e5f\u5e76\u4e0d\u662f\u4e0d\u4f1a\u4f7f\u7528\u5230\uff0c\u56e0\u6b64\u6b64\u79cd\u65b9\u5f0f\u4e5f\u9700\u8981\u5f15\u8d77\u91cd\u89c6\u3002<\/strong><\/p>\n<pre><code>@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)\n@Service\npublic\u00a0class\u00a0A\u00a0{\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0B b;\n\u00a0 \u00a0 }\n@Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)\n@Service\npublic\u00a0class\u00a0B\u00a0{\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0A a;\n\u00a0 \u00a0 }<\/code><\/pre>\n<p>\u7ed3\u679c\uff1a<strong>\u9700\u8981\u6ce8\u610f\u7684\u662f\u672c\u4f8b\u4e2d\u542f\u52a8\u65f6\u662f\u4e0d\u4f1a\u62a5\u9519\u7684<\/strong>\uff08\u56e0\u4e3a\u975e\u5355\u4f8bBean\u9ed8\u8ba4\u4e0d\u4f1a\u521d\u59cb\u5316\uff0c\u800c\u662f\u4f7f\u7528\u65f6\u624d\u4f1a\u521d\u59cb\u5316\uff09\uff0c\u6240\u4ee5\u5f88\u7b80\u5355\u54b1\u4eec\u53ea\u9700\u8981\u624b\u52a8getBean()\u6216\u8005\u5728\u4e00\u4e2a\u5355\u4f8bBean\u5185@Autowired\u4e00\u4e0b\u5b83\u5373\u53ef\u3002<\/p>\n<pre><code>\/\/ \u5728\u5355\u4f8bBean\u5185\u6ce8\u5165\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0A a;<\/code><\/pre>\n<p>\u8fd9\u6837\u5b50\u542f\u52a8\u5c31\u62a5\u9519\uff1a<\/p>\n<pre><code>org.springframework.beans.factory.UnsatisfiedDependencyException:\u00a0Error\u00a0creating bean\u00a0with\u00a0name\u00a0'mytest.TestSpringBean':\u00a0Unsatisfied\u00a0dependency expressed through field\u00a0'a'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:\u00a0Error\u00a0creating bean\u00a0with\u00a0name\u00a0'a':\u00a0Unsatisfied\u00a0dependency expressed through field\u00a0'b'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException:\u00a0Error\u00a0creating bean\u00a0with\u00a0name\u00a0'b':\u00a0Unsatisfied\u00a0dependency expressed through field\u00a0'a'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException:\u00a0Error\u00a0creating bean\u00a0with\u00a0name\u00a0'a':\u00a0Requested\u00a0bean is currently\u00a0in\u00a0creation:\u00a0Is\u00a0there an unresolvable circular reference?\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)\n\u00a0 \u00a0 \u00a0 \u00a0 at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)<\/code><\/pre>\n<p>\u5982\u4f55\u89e3\u51b3\uff1f\u53ef\u80fd\u6709\u7684\u5c0f\u4f19\u4f34\u770b\u5230\u7f51\u4e0a\u6709\u8bf4\u4f7f\u7528@Lazy\u6ce8\u89e3\u89e3\u51b3\uff1a<\/p>\n<pre><code>\u00a0 \u00a0\u00a0@Lazy\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0A a;<\/code><\/pre>\n<p>\u6b64\u5904\u8d1f\u8d23\u4efb\u7684\u544a\u8bc9\u4f60\u8fd9\u6837\u662f\u89e3\u51b3\u4e0d\u4e86\u95ee\u9898\u7684(<strong>\u53ef\u80fd\u4f1a\u63a9\u76d6\u95ee\u9898<\/strong>)\uff0c@Lazy\u53ea\u662f\u5ef6\u8fdf\u521d\u59cb\u5316\u800c\u5df2\uff0c\u5f53\u4f60\u771f\u6b63\u4f7f\u7528\u5230\u5b83\uff08\u521d\u59cb\u5316\uff09\u7684\u65f6\u5019\uff0c\u4f9d\u65e7\u4f1a\u62a5\u5982\u4e0a\u5f02\u5e38\u3002<\/p>\n<p>\u5bf9\u4e8eSpring\u5faa\u73af\u4f9d\u8d56\u7684\u60c5\u51b5\u603b\u7ed3\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u4e0d\u80fd\u89e3\u51b3\u7684\u60c5\u51b5\uff1a\u6784\u9020\u5668\u6ce8\u5165\u5faa\u73af\u4f9d\u8d56\uff0cprototype\u00a0field\u5c5e\u6027\u6ce8\u5165\u5faa\u73af\u4f9d\u8d56<\/li>\n<li>\u80fd\u89e3\u51b3\u7684\u60c5\u51b5\uff1afield\u5c5e\u6027\u6ce8\u5165\uff08setter\u65b9\u6cd5\u6ce8\u5165\uff09\u5faa\u73af\u4f9d\u8d56<\/li>\n<\/ul>\n<p><strong>Spring\u5982\u4f55\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56<\/strong><\/p>\n<p>Spring \u662f\u901a\u8fc7\u4e09\u7ea7\u7f13\u5b58\u548c\u63d0\u524d\u66dd\u5149\u7684\u673a\u5236\u6765\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u7684\u95ee\u9898\u3002<\/p>\n<p><strong>\u4e09\u7ea7\u7f13\u5b58<\/strong><\/p>\n<p>\u4e09\u7ea7\u7f13\u5b58\u5176\u5b9e\u5c31\u662f\u7528\u4e09\u4e2a\u00a0Map\u00a0\u6765\u5b58\u50a8\u4e0d\u540c\u9636\u6bb5 Bean \u5bf9\u8c61\u3002<\/p>\n<pre><code>\u4e00\u7ea7\u7f13\u5b58\nprivate\u00a0final\u00a0Map&lt;String,\u00a0Object&gt; singletonObjects =\u00a0new\u00a0ConcurrentHashMap&lt;&gt;(256);\n\u4e8c\u7ea7\u7f13\u5b58\nprivate\u00a0final\u00a0Map&lt;String,\u00a0ObjectearlySingletonObjects\u00a0=\u00a0new\u00a0HashMap&lt;&gt;(16);\n\/\/\u4e09\u7ea7\u7f13\u5b58\nprivate\u00a0final\u00a0Map&lt;String,\u00a0ObjectFactory&lt;?&gt;&gt; singletonFactories =\u00a0new\u00a0HashMap&lt;&gt;(16)<\/code><\/pre>\n<ul>\n<li>singletonObjects\uff1a\u7528\u4e8e\u5b58\u653e\u5b8c\u5168\u521d\u59cb\u5316\u597d\u7684 bean\uff0c<strong>\u4ece\u8be5\u7f13\u5b58\u4e2d\u53d6\u51fa\u7684 bean \u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528<\/strong>\u3002<\/li>\n<li>earlySingletonObjects\uff1a\u63d0\u524d\u66dd\u5149\u7684\u5355\u4f8b\u5bf9\u8c61\u7684cache\uff0c\u5b58\u653e\u539f\u59cb\u7684 bean \u5bf9\u8c61\uff08\u5c1a\u672a\u586b\u5145\u5c5e\u6027\uff09\uff0c\u7528\u4e8e\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u3002<\/li>\n<li>singletonFactories\uff1a\u5355\u4f8b\u5bf9\u8c61\u5de5\u5382\u7684cache\uff0c\u5b58\u653e bean \u5de5\u5382\u5bf9\u8c61\uff0c\u7528\u4e8e\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u3002<\/li>\n<\/ul>\n<p><strong>\u4e09\u7ea7\u7f13\u5b58\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u8fc7\u7a0b<\/strong><\/p>\n<p>\u5047\u8bbe\u73b0\u5728\u6211\u4eec\u6709ServiceA\u548cServiceB\u4e24\u4e2a\u7c7b\uff0c\u8fd9\u4e24\u4e2a\u7c7b\u76f8\u4e92\u4f9d\u8d56\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code>@Service\npublic\u00a0class\u00a0ServiceA {\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0ServiceB serviceB;\n\u00a0 \u00a0 }\n\n\n@Service\npublic\u00a0class\u00a0ServiceB {\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0ServiceA serviceA ;\n\u00a0 \u00a0 }<\/code><\/pre>\n<p>\u4e0b\u9762\u7684\u65f6\u5e8f\u56fe\u8bf4\u660e\u4e86spring\u7528\u4e09\u7ea7\u7f13\u5b58\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u7684\u4e3b\u8981\u6d41\u7a0b\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"729\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8B\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p><strong>\u4e3a\u4ec0\u4e48\u9700\u8981\u4e09\u7ea7\u7f13\u5b58\uff1f<\/strong><\/p>\n<p>\u8fd9\u662f\u4e00\u4e2a\u7406\u89e3Spring\u5bb9\u5668\u5982\u4f55\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u7684\u6838\u5fc3\u6982\u5ff5\u3002<strong>\u4e09\u7ea7\u7f13\u5b58<\/strong>\u662fSpring\u4e3a\u4e86\u89e3\u51b3<strong>\u5faa\u73af\u4f9d\u8d56<\/strong>\u7684\u540c\u65f6\uff0c\u53c8\u80fd\u4fdd\u8bc1<strong>AOP\u4ee3\u7406<\/strong>\u7684\u6b63\u786e\u6027\u800c\u8bbe\u8ba1\u7684\u7cbe\u5999\u673a\u5236\u3002<\/p>\n<p>\u4e3a\u4e86\u7406\u89e3\u4e3a\u4ec0\u4e48\u9700\u8981\u4e09\u7ea7\u7f13\u5b58\uff0c\u6211\u4eec\u4e00\u6b65\u6b65\u6765\u770b\u3002<\/p>\n<p><strong>\u5982\u679c\u6ca1\u6709\u7f13\u5b58\uff08Level 0\uff09<\/strong><\/p>\n<p>\u5047\u8bbe\u6709\u4e24\u4e2aBean\uff1aServiceA \u00a0\u548c ServiceB\uff0c\u5b83\u4eec\u76f8\u4e92\u4f9d\u8d56\u3002<\/p>\n<p>Java<\/p>\n<pre><code>@Component\npublic\u00a0class\u00a0ServiceA \u00a0{\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0ServiceB serviceB;\n}\n@Component\npublic\u00a0class\u00a0ServiceB {\n\u00a0 \u00a0\u00a0@Autowired\n\u00a0 \u00a0\u00a0private\u00a0ServiceA serviceA;\n}<\/code><\/pre>\n<p><strong>\u521b\u5efa\u8fc7\u7a0b\uff08\u65e0\u7f13\u5b58\uff09<\/strong> \uff1a<\/p>\n<ul>\n<li>\u5f00\u59cb\u521b\u5efa ServiceA -&gt; \u53d1\u73b0 ServiceA \u9700\u8981 ServiceB -&gt; \u5f00\u59cb\u521b\u5efa ServiceB<\/li>\n<li>\u5f00\u59cb\u521b\u5efa ServiceB -&gt; \u53d1\u73b0 ServiceB \u9700\u8981 ServiceA -&gt; \u5f00\u59cb\u521b\u5efa ServiceA<\/li>\n<li>\u5f00\u59cb\u521b\u5efa ServiceA -&gt; \u53d1\u73b0 ServiceA \u9700\u8981 ServiceB -&gt; &#8230;\u00a0<strong>\u65e0\u9650\u5faa\u73af\uff0cStackOverflowError<\/strong><\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong>\uff1a\u65e0\u6cd5\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\uff0c\u76f4\u63a5\u6b7b\u5faa\u73af\u3002<\/p>\n<p><strong>\u5982\u679c\u53ea\u6709\u4e00\u7ea7\u7f13\u5b58\uff08Singleton Objects\uff09<\/strong><\/p>\n<p>\u4e00\u7ea7\u7f13\u5b58\u5b58\u653e\u7684\u662f<strong>\u5df2\u7ecf\u5b8c\u5168\u521b\u5efa\u597d\u3001\u521d\u59cb\u5316\u5b8c\u6bd5<\/strong>\u7684Bean\u3002<\/p>\n<p><strong>\u95ee\u9898<\/strong>\uff1a\u5728Bean\u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\uff08\u6bd4\u5982\u5728\u586b\u5145\u5c5e\u6027\u00a0populateBean\u00a0\u65f6\uff09\uff0cServiceA\u8fd8\u6ca1\u521b\u5efa\u5b8c\uff0c\u5b83\u672c\u8eab\u4e0d\u5e94\u8be5\u88ab\u653e\u5165&#8221;\u5df2\u5b8c\u6210&#8221;\u7684\u4e00\u7ea7\u7f13\u5b58\u3002\u4f46\u5982\u679cServiceB\u9700\u8981ServiceA\uff0c\u800c\u4e00\u7ea7\u7f13\u5b58\u91cc\u53c8\u6ca1\u6709ServiceA\u7684\u534a\u6210\u54c1\uff0cServiceB\u5c31\u65e0\u6cd5\u5b8c\u6210\u521b\u5efa\u3002\u8fd9\u5c31\u56de\u5230\u4e86\u4e0a\u9762\u7684\u6b7b\u5faa\u73af\u95ee\u9898\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong>\uff1a\u4e00\u7ea7\u7f13\u5b58\u65e0\u6cd5\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u3002<\/p>\n<p><strong>\u5982\u679c\u4f7f\u7528\u4e8c\u7ea7\u7f13\u5b58<\/strong><\/p>\n<p>\u4e8c\u7ea7\u7f13\u5b58\u7684\u6838\u5fc3\u601d\u8def\u662f\uff1a<strong>\u5c06\u5c1a\u672a\u5b8c\u5168\u521d\u59cb\u5316\u597d\u7684\u201c\u65e9\u671f\u5f15\u7528\u201d\u66b4\u9732\u51fa\u6765\u3002<\/strong><\/p>\n<p>\u73b0\u5728\u6211\u4eec\u6709\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u7ea7\u7f13\u5b58\uff08\u6210\u54c1\u5e93\uff09<\/strong> \uff1a\u5b58\u653e\u5b8c\u5168\u51c6\u5907\u597d\u7684Bean\u3002<\/li>\n<li><strong>\u4e8c\u7ea7\u7f13\u5b58\uff08\u534a\u6210\u54c1\u5e93\uff09<\/strong> \uff1a\u5b58\u653e\u521a\u521a\u5b9e\u4f8b\u5316\uff08\u8c03\u7528\u4e86\u6784\u9020\u65b9\u6cd5\uff09\uff0c\u4f46\u8fd8\u672a\u586b\u5145\u5c5e\u6027\u548c\u521d\u59cb\u5316\u7684Bean\u7684\u65e9\u671f\u5f15\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u521b\u5efa\u8fc7\u7a0b\uff08\u4e8c\u7ea7\u7f13\u5b58\uff09\uff1a<\/strong><\/p>\n<p><strong>\u5f00\u59cb\u521b\u5efaServiceA<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5b9e\u4f8b\u5316ServiceA\uff08\u8c03\u7528ServiceA\u7684\u6784\u9020\u65b9\u6cd5\uff09\uff0c\u5f97\u5230\u4e00\u4e2aServiceA\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/li>\n<li>\u5c06ServiceA\u7684\u539f\u59cb\u5bf9\u8c61\u653e\u5165\u4e8c\u7ea7\u7f13\u5b58\uff08\u534a\u6210\u54c1\u5e93\uff09\u3002<\/li>\n<li>\u5f00\u59cb\u4e3aServiceA\u586b\u5145\u5c5e\u6027 -&gt; \u53d1\u73b0\u9700\u8981ServiceB\u3002<\/li>\n<\/ul>\n<p><strong>\u5f00\u59cb\u521b\u5efaServiceB<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5b9e\u4f8b\u5316ServiceB\uff08\u8c03\u7528B\u7684\u6784\u9020\u65b9\u6cd5\uff09\uff0c\u5f97\u5230\u4e00\u4e2aServiceB\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/li>\n<li>\u5c06ServiceB\u7684\u539f\u59cb\u5bf9\u8c61\u653e\u5165\u4e8c\u7ea7\u7f13\u5b58\u3002<\/li>\n<li>\u5f00\u59cb\u4e3aServiceB\u586b\u5145\u5c5e\u6027 -&gt; \u53d1\u73b0\u9700\u8981ServiceA\u3002<\/li>\n<\/ul>\n<p><strong>ServiceB\u4ece\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u83b7\u53d6A<\/strong>\uff1a<\/p>\n<ul>\n<li>ServiceB\u6210\u529f\u4ece\u4e8c\u7ea7\u7f13\u5b58\u4e2d\u62ff\u5230\u4e86ServiceA\u7684\u65e9\u671f\u5f15\u7528\uff08\u539f\u59cb\u5bf9\u8c61\uff09\u3002<\/li>\n<li>ServiceB\u987a\u5229\u5b8c\u6210\u4e86\u5c5e\u6027\u586b\u5145\u3001\u521d\u59cb\u5316\u7b49\u540e\u7eed\u6b65\u9aa4\uff0c\u6210\u4e3a\u4e00\u4e2a\u5b8c\u6574\u7684Bean\u3002<\/li>\n<li>\u5c06\u5b8c\u6574\u7684ServiceB\u653e\u5165\u4e00\u7ea7\u7f13\u5b58\uff08\u6210\u54c1\u5e93\uff09\uff0c\u5e76\u4ece\u4e8c\u7ea7\u7f13\u5b58\u79fb\u9664ServiceB\u3002<\/li>\n<\/ul>\n<p><strong>ServiceA\u7ee7\u7eed\u521b\u5efa\uff1a<\/strong><\/p>\n<ul>\n<li>ServiceA\u62ff\u5230\u4e86\u521b\u5efa\u597d\u7684ServiceB\uff0c\u5b8c\u6210\u4e86\u81ea\u5df1\u7684\u5c5e\u6027\u586b\u5145\u548c\u521d\u59cb\u5316\u3002<\/li>\n<li>\u5c06\u5b8c\u6574\u7684ServiceA\u653e\u5165\u4e00\u7ea7\u7f13\u5b58\uff08\u6210\u54c1\u5e93\uff09\uff0c\u5e76\u4ece\u4e8c\u7ea7\u7f13\u5b58\u79fb\u9664ServiceA\u3002<\/li>\n<\/ul>\n<p><strong>\u95ee\u9898\u6765\u4e86\uff1a\u5982\u679cServiceA\u9700\u8981\u88abAOP\u4ee3\u7406\u600e\u4e48\u529e\uff1f<\/strong><\/p>\n<p>\u5982\u679cA\u7c7b\u4e0a\u52a0\u4e86\u00a0@Transactional\u00a0\u7b49\u9700\u8981\u521b\u5efa\u4ee3\u7406\u7684\u6ce8\u89e3\uff0c\u90a3\u4e48\u6700\u7ec8\u9700\u8981\u66b4\u9732\u7ed9\u5176\u4ed6Bean\u7684<strong>\u5e94\u8be5\u662fServiceA\u7684\u4ee3\u7406\u5bf9\u8c61\uff0c\u800c\u4e0d\u662fServiceA\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/strong><\/p>\n<p>\u5728\u4e8c\u7ea7\u7f13\u5b58\u65b9\u6848\u4e2d\uff0cServiceB\u62ff\u5230\u7684\u662fA\u7684<strong>\u539f\u59cb\u5bf9\u8c61<\/strong>\u3002\u4f46\u6700\u7ec8<strong>ServiceA<\/strong>\u5b8c\u6210\u540e\uff0c\u653e\u5165\u4e00\u7ea7\u7f13\u5b58\u7684\u662f<strong>ServiceA\u7684\u4ee3\u7406\u5bf9\u8c61<\/strong>\u3002\u8fd9\u5c31\u5bfc\u81f4\u4e86\uff1a<\/p>\n<ul>\n<li><strong>ServiceB\u91cc\u9762\u6301\u6709\u7684ServiceA\u662f\u539f\u59cb\u5bf9\u8c61\u3002<\/strong><\/li>\n<li><strong>\u800c\u5176\u4ed6\u5730\u65b9\u6ce8\u5165\u7684ServiceA\u662f\u4ee3\u7406\u5bf9\u8c61\u3002<\/strong><\/li>\n<li>\u8fd9\u5c31\u9020\u6210\u4e86<strong>\u4e0d\u4e00\u81f4<\/strong>\uff01\u5982\u679c\u901a\u8fc7ServiceB\u7684ServiceA\u53bb\u8c03\u7528\u4e8b\u52a1\u65b9\u6cd5\uff0c\u4e8b\u52a1\u4f1a\u5931\u6548\uff0c\u56e0\u4e3a\u90a3\u662f\u4e00\u4e2a\u6ca1\u6709\u88ab\u4ee3\u7406\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong>\uff1a\u4e8c\u7ea7\u7f13\u5b58\u53ef\u4ee5\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u95ee\u9898\uff0c\u4f46\u65e0\u6cd5\u6b63\u786e\u5904\u7406\u9700\u8981AOP\u4ee3\u7406\u7684Bean\u3002<\/p>\n<p><strong>\u4e09\u7ea7\u7f13\u5b58\u7684\u767b\u573a\uff08Spring\u7684\u7ec8\u6781\u65b9\u6848\uff09<\/strong><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u4ee3\u7406\u95ee\u9898\uff0cSpring\u5f15\u5165\u4e86\u7b2c\u4e09\u7ea7\u7f13\u5b58\u3002\u5b83\u7684\u6838\u5fc3\u4e0d\u662f\u4e00\u4e2a\u76f4\u63a5\u5b58\u653e\u5bf9\u8c61\uff08Object\uff09\u7684\u7f13\u5b58\uff0c\u800c\u662f\u4e00\u4e2a\u5b58\u653e\u00a0<strong>ObjectFactory\uff08\u5bf9\u8c61\u5de5\u5382\uff09<\/strong> \u7684\u7f13\u5b58\u3002<\/p>\n<p>\u4e09\u7ea7\u7f13\u5b58\u7684\u7ed3\u6784\u662f\uff1aMap&lt;String, ObjectFactory&lt;?&gt;&gt; singletonFactories<\/p>\n<p><strong>\u521b\u5efa\u8fc7\u7a0b\uff08\u4e09\u7ea7\u7f13\u5b58\uff0c\u4ee5ServiceA\u9700\u8981\u4ee3\u7406\u4e3a\u4f8b\uff09\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5f00\u59cb\u521b\u5efaServiceA<\/strong>\uff1a<\/li>\n<\/ul>\n<p>&lt;!&#8212;-&gt;<\/p>\n<ul>\n<li>\u5b9e\u4f8b\u5316ServiceA\uff0c\u5f97\u5230ServiceA\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/li>\n<li>\u5411<strong>\u4e09\u7ea7\u7f13\u5b58<\/strong>\u6dfb\u52a0\u4e00\u4e2aObjectFactory\u3002\u8fd9\u4e2a\u5de5\u5382\u7684getObject()\u65b9\u6cd5<strong>\u6709\u80fd\u529b\u5224\u65adServiceA\u662f\u5426\u9700\u8981\u4ee3\u7406\uff0c\u5e76\u8fd4\u56de\u76f8\u5e94\u7684\u5bf9\u8c61\uff08\u539f\u59cb\u5bf9\u8c61\u6216\u4ee3\u7406\u5bf9\u8c61\uff09<\/strong> \u3002<\/li>\n<li>\u5f00\u59cb\u4e3aServiceA\u586b\u5145\u5c5e\u6027 -&gt; \u53d1\u73b0\u9700\u8981ServiceB\u3002<br \/>&#8211;<\/li>\n<li><strong>\u5f00\u59cb\u521b\u5efaB<\/strong>\uff1a<\/li>\n<li>\u5b9e\u4f8b\u5316ServiceB\u3002<\/li>\n<li>\u540c\u6837\u5411\u4e09\u7ea7\u7f13\u5b58\u6dfb\u52a0\u4e00\u4e2aServiceB\u7684ObjectFactory\u3002<\/li>\n<li>\u5f00\u59cb\u4e3aServiceB\u586b\u5145\u5c5e\u6027 -&gt; \u53d1\u73b0\u9700\u8981ServiceA\u3002<br \/>&#8211;<\/li>\n<li><strong>ServiceB\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6ServiceA<\/strong>\uff1a<\/li>\n<li>ServiceB\u53d1\u73b0\u4e00\u7ea7\u7f13\u5b58\u6ca1\u6709ServiceA\uff0c\u4e8c\u7ea7\u7f13\u5b58\u4e5f\u6ca1\u6709ServiceA\u3002<\/li>\n<li>ServiceB\u53d1\u73b0\u4e09\u7ea7\u7f13\u5b58\u6709A\u7684ObjectFactory\u3002<\/li>\n<li>B\u8c03\u7528\u8fd9\u4e2a\u5de5\u5382\u7684getObject()\u65b9\u6cd5\u3002<strong>\u6b64\u65f6\uff0cSpring\u4f1a\u6267\u884c\u4e00\u4e2a\u5173\u952e\u903b\u8f91\uff1a<\/strong><\/li>\n<li>\u5982\u679cServiceA\u9700\u8981\u88ab\u4ee3\u7406\uff0c\u5de5\u5382\u4f1a<strong>\u63d0\u524d\u751f\u6210ServiceA\u7684\u4ee3\u7406\u5bf9\u8c61<\/strong>\u5e76\u8fd4\u56de\u3002<\/li>\n<li>\u5982\u679cServiceA\u4e0d\u9700\u8981\u4ee3\u7406\uff0c\u5de5\u5382\u5219\u8fd4\u56deA\u7684\u539f\u59cb\u5bf9\u8c61\u3002<\/li>\n<li>\u5c06\u8fd9\u4e2a<strong>\u65e9\u671f\u5f15\u7528\uff08\u53ef\u80fd\u662f\u539f\u59cb\u5bf9\u8c61\uff0c\u4e5f\u53ef\u80fd\u662f\u4ee3\u7406\u5bf9\u8c61\uff09<\/strong> \u653e\u5165<strong>\u4e8c\u7ea7\u7f13\u5b58<\/strong>\uff0c\u540c\u65f6\u4ece\u4e09\u7ea7\u7f13\u5b58\u79fb\u9664A\u7684\u5de5\u5382\u3002<\/li>\n<li>ServiceB\u62ff\u5230\u4e86ServiceA\u7684<strong>\u6b63\u786e\u7248\u672c<\/strong>\u7684\u65e9\u671f\u5f15\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u540e\u7eed\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ul>\n<li>ServiceB\u5b8c\u6210\u521b\u5efa\uff0c\u653e\u5165\u4e00\u7ea7\u7f13\u5b58\u3002<\/li>\n<li>ServiceA\u7ee7\u7eed\u7528ServiceB\u5b8c\u6210\u521b\u5efa\u3002\u5728ServiceA\u521d\u59cb\u5316\u7684\u6700\u540e\uff0cSpring\u4f1a\u518d\u6b21\u68c0\u67e5\uff1a\u5982\u679cServiceA\u5df2\u7ecf\u88ab\u63d0\u524d\u4ee3\u7406\u4e86\uff08\u5373\u5728\u7b2c3\u6b65\u4e2d\uff09\uff0c\u90a3\u4e48\u5c31\u76f4\u63a5\u8fd4\u56de\u8fd9\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff1b\u5982\u679c\u6ca1\u6709\uff0c\u5219\u53ef\u80fd\u5728\u6b64\u5904\u521b\u5efa\u4ee3\u7406\uff08\u5bf9\u4e8e\u4e0d\u9700\u8981\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u7684Bean\uff09\u3002<\/li>\n<li>\u6700\u7ec8\uff0c\u5c06\u5b8c\u6574\u7684ServiceA\uff08\u4ee3\u7406\u5bf9\u8c61\uff09\u653e\u5165\u4e00\u7ea7\u7f13\u5b58\uff0c\u5e76\u6e05\u7406\u4e8c\u7ea7\u7f13\u5b58\u3002<\/li>\n<\/ul>\n<p><strong>\u603b\u7ed3\uff1a\u4e3a\u4ec0\u4e48\u9700\u8981\u4e09\u7ea7\u7f13\u5b58\uff1f<\/strong><\/p>\n<p>\u9700\u8981\u4e09\u7ea7\u7f13\u5b58\uff0c\u662f\u56e0\u4e3aSpring\u8981\u89e3\u51b3\u4e00\u4e2a\u590d\u6742\u95ee\u9898\uff1a<strong>\u5728\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u7684\u60c5\u51b5\u4e0b\uff0c\u5982\u4f55\u786e\u4fdd\u6240\u6709Bean\u90fd\u80fd\u62ff\u5230\u6700\u7ec8\u5f62\u6001\uff08\u53ef\u80fd\u88abAOP\u4ee3\u7406\uff09\u7684\u4f9d\u8d56\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u7684\u3001\u672a\u4ee3\u7406\u7684\u5bf9\u8c61\u3002<\/strong> \u4e09\u7ea7\u7f13\u5b58\u901a\u8fc7\u4e00\u4e2aObjectFactory\u5c06\u4ee3\u7406\u7684\u65f6\u673a\u63d0\u524d\uff0c\u5b8c\u7f8e\u5730\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u4e8c\u7ea7\u7f13\u5b58\u4e3b\u8981\u662f\u4e3a\u4e86\u6027\u80fd\u4f18\u5316\u800c\u5b58\u5728\u7684\u3002<\/p>\n<p><strong>spring\u4e09\u7ea7\u7f13\u5b58\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u89e3\u51b3<\/strong><\/p>\n<p><strong>@Async\u6ce8\u89e3\u7684\u5faa\u73af\u4f9d\u8d56\u95ee\u9898<\/strong><\/p>\n<p>\u8fd9\u89e6\u53ca\u4e86 Spring \u4ee3\u7406\u673a\u5236\u7684\u4e00\u4e2a\u6df1\u5c42\u6b21\u533a\u522b\u3002@Async\u6ce8\u89e3\u7684\u5faa\u73af\u4f9d\u8d56\u95ee\u9898\u786e\u5b9e\u6bd4@Transactional\u00a0\u66f4\u590d\u6742\uff0c<strong>\u4e09\u7ea7\u7f13\u5b58\u65e0\u6cd5\u5b8c\u5168\u89e3\u51b3<\/strong>\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u5206\u6790\u539f\u56e0\u3002<\/p>\n<h2>2.2 Spring\u521b\u5efaBean\u4e3b\u8981\u6d41\u7a0b<\/h2>\n<p>\u4e3a\u4e86\u5bb9\u6613\u7406\u89e3 Spring \u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\u8fc7\u7a0b\uff0c\u6211\u4eec\u5148\u7b80\u5355\u6e29\u4e60\u4e0b Spring \u5bb9\u5668\u521b\u5efa Bean \u7684\u4e3b\u8981\u6d41\u7a0b\u3002<\/p>\n<p>\u4ece\u4ee3\u7801\u770bSpring\u5bf9\u4e8eBean\u7684\u751f\u6210\u8fc7\u7a0b\uff0c\u6b65\u9aa4\u8fd8\u662f\u5f88\u591a\u7684\uff0c\u6211\u628a\u4e00\u4e9b\u6269\u5c55\u4e1a\u52a1\u4ee3\u7801\u7701\u7565\u6389\uff1a<\/p>\n<pre><code>protected\u00a0Object\u00a0doCreateBean(final\u00a0String\u00a0beanName, final\u00a0RootBeanDefinition\u00a0mbd, final\u00a0@Nullable\u00a0Object[] args)\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 throws\u00a0BeanCreationException\u00a0{\n\u00a0 \u00a0\u00a0if\u00a0(mbd.isSingleton()) {\n\u00a0 \u00a0 \u00a0 instanceWrapper =\u00a0this.factoryBeanInstanceCache.remove(beanName);\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\/\/ Bean\u521d\u59cb\u5316\u7b2c\u4e00\u6b65\uff1a\u9ed8\u8ba4\u8c03\u7528\u65e0\u53c2\u6784\u9020\u5b9e\u4f8b\u5316Bean\n\u00a0 \u00a0\u00a0\/\/ \u5982\u679c\u662f\u53ea\u6709\u5e26\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u6784\u9020\u65b9\u6cd5\u91cc\u7684\u53c2\u6570\u4f9d\u8d56\u6ce8\u5165\uff0c\u5c31\u662f\u53d1\u751f\u5728\u8fd9\u4e00\u6b65\n\u00a0 \u00a0\u00a0if\u00a0(instanceWrapper ==\u00a0null) {\n\u00a0 \u00a0 \u00a0 instanceWrapper =\u00a0createBeanInstance(beanName, mbd, args);\n\u00a0 \u00a0 }\n\n\n\u00a0 \u00a0\u00a0\/\/\u5224\u65adBean\u662f\u5426\u9700\u8981\u63d0\u524d\u66b4\u9732\u5bf9\u8c61\u7528\u6765\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\uff0c\u9700\u8981\u5219\u542f\u52a8spring\u4e09\u7ea7\u7f13\u5b58\n\u00a0 \u00a0\u00a0boolean\u00a0earlySingletonExposure = (mbd.isSingleton() &amp;&amp;\u00a0this.allowCircularReferences\u00a0&amp;&amp;\n\u00a0 \u00a0 \u00a0 \u00a0isSingletonCurrentlyInCreation(beanName));\n\u00a0 \u00a0if\u00a0(earlySingletonExposure) {\n\u00a0 \u00a0 \u00a0if\u00a0(logger.isTraceEnabled()) {\n\u00a0 \u00a0 \u00a0 \u00a0logger.trace(&quot;Eagerly caching bean '&quot;\u00a0+ beanName +\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;' to allow for resolving potential circular references&quot;);\n\u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0addSingletonFactory(beanName, () -&gt;\u00a0getEarlyBeanReference(beanName, mbd, bean));\n}\n\n\n\u00a0 \u00a0\u00a0\/\/ Initialize the bean instance.\n\u00a0 \u00a0\u00a0Object\u00a0exposedObject = bean;\n\u00a0 \u00a0\u00a0try\u00a0{\n\u00a0 \u00a0 \u00a0\u00a0\/\/ bean\u521b\u5efa\u7b2c\u4e8c\u6b65\uff1a\u586b\u5145\u5c5e\u6027\uff08DI\u4f9d\u8d56\u6ce8\u5165\u53d1\u751f\u5728\u6b64\u6b65\u9aa4\uff09\n\u00a0 \u00a0 \u00a0\u00a0populateBean(beanName, mbd, instanceWrapper);\n\u00a0 \u00a0 \u00a0\u00a0\/\/ bean\u521b\u5efa\u7b2c\u4e09\u6b65\uff1a\u8c03\u7528\u521d\u59cb\u5316\u65b9\u6cd5\uff0c\u5b8c\u6210bean\u7684\u521d\u59cb\u5316\u64cd\u4f5c\uff08AOP\u7684\u7b2c\u4e09\u4e2a\u5165\u53e3\uff09\n\u00a0 \u00a0 \u00a0\u00a0\/\/ AOP\u662f\u901a\u8fc7\u81ea\u52a8\u4ee3\u7406\u521b\u5efa\u5668AbstractAutoProxyCreator\u7684postProcessAfterInitialization()\n\/\/\u65b9\u6cd5\u7684\u6267\u884c\u8fdb\u884c\u4ee3\u7406\u5bf9\u8c61\u7684\u521b\u5efa\u7684,AbstractAutoProxyCreator\u662fBeanPostProcessor\u63a5\u53e3\u7684\u5b9e\u73b0\n\u00a0 \u00a0 \u00a0 exposedObject =\u00a0initializeBean(beanName, exposedObject, mbd);\n\n\n\n\n\u00a0 \u00a0if\u00a0(earlySingletonExposure) {\n\u00a0 \u00a0\u00a0Object\u00a0earlySingletonReference =\u00a0getSingleton(beanName,\u00a0false);\n\u00a0 \u00a0 \u00a0if\u00a0(earlySingletonReference !=\u00a0null) {\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0if\u00a0(exposedObject == bean) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 exposedObject = earlySingletonReference;\n\u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0else\u00a0if\u00a0(!this.allowRawInjectionDespiteWrapping\u00a0&amp;&amp;\u00a0hasDependentBean(beanName)) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0String[] dependentBeans =\u00a0getDependentBeans(beanName);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0Set&lt;String&gt; actualDependentBeans =\u00a0new\u00a0LinkedHashSet&lt;&gt;(dependentBeans.length);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0for\u00a0(String\u00a0dependentBean : dependentBeans) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0if\u00a0(!removeSingletonIfCreatedForTypeCheckOnly(dependentBean)) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 actualDependentBeans.add(dependentBean);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0if\u00a0(!actualDependentBeans.isEmpty()) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0throw\u00a0new\u00a0BeanCurrentlyInCreationException(beanName,\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;Bean with name '&quot;\u00a0+ beanName +\u00a0&quot;' has been injected into other beans [&quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0StringUtils.collectionToCommaDelimitedString(actualDependentBeans) +\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;] in its raw version as part of a circular reference, but has eventually been &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;wrapped. This means that said other beans do not use the final version of the &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;bean. This is often the result of over-eager type matching - consider using &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 }\n}\n\n\n\u00a0 \u00a0 }\u00a0catch\u00a0(Throwable\u00a0ex) {\n\u00a0 \u00a0 \u00a0\u00a0\/\/ ...\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\/\/ ...\n\u00a0 \u00a0\u00a0return\u00a0exposedObject;\n\u00a0 \u00a0 }<\/code><\/pre>\n<p>\u4ece\u4e0a\u8ff0\u4ee3\u7801\u770b\u51fa\uff0c\u6574\u4f53\u8109\u7edc\u53ef\u4ee5\u5f52\u7eb3\u6210 3 \u4e2a\u6838\u5fc3\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u5b9e\u4f8b\u5316Bean\uff1a\u4e3b\u8981\u662f\u901a\u8fc7\u53cd\u5c04\u8c03\u7528\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u521b\u5efa Bean \u5b9e\u4f8b\uff0c\u6b64\u65f6Bean\u7684\u5c5e\u6027\u90fd\u8fd8\u662f\u9ed8\u8ba4\u503cnull\u3002\u88ab\u6ce8\u89e3@Bean\u6807\u8bb0\u7684\u65b9\u6cd5\u5c31\u662f\u6b64\u9636\u6bb5\u88ab\u8c03\u7528\u7684\u3002<\/li>\n<li>\u586b\u5145Bean\u5c5e\u6027\uff1a\u8fd9\u4e00\u6b65\u4e3b\u8981\u662f\u5bf9Bean\u7684\u4f9d\u8d56\u5c5e\u6027\u8fdb\u884c\u586b\u5145\uff0c\u5bf9@Value\u3001@Autowired\u3001@Resource\u6ce8\u89e3\u6807\u6ce8\u7684\u5c5e\u6027\u6ce8\u5165\u5bf9\u8c61\u5f15\u7528\u3002<\/li>\n<li>\u8c03\u7528Bean\u521d\u59cb\u5316\u65b9\u6cd5\uff1a\u8c03\u7528\u914d\u7f6e\u6307\u5b9a\u4e2d\u7684init\u65b9\u6cd5\uff0c\u5982 xml\u6587\u4ef6\u6307\u5b9aBean\u7684init-method\u65b9\u6cd5\u6216\u6ce8\u89e3\u00a0@Bean(initMethod = &#8220;initMethod&#8221;)\u6307\u5b9a\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<h2>\u4e09\u3001\u6848\u4f8b\u5206\u6790<\/h2>\n<h2>3.1 \u4ee3\u7801\u5206\u6790<\/h2>\n<p>\u4ee5\u4e0b\u662f\u6211\u7b80\u5316\u540e\u7684\u7c7b\u4e4b\u95f4\u5927\u4f53\u7684\u4f9d\u8d56\u5173\u7cfb\uff0c\u5de5\u7a0b\u5185\u5b9e\u9645\u7684\u4f9d\u8d56\u60c5\u51b5\u4f1a\u6bd4\u8fd9\u4e2a\u7b80\u5316\u7248\u672c\u590d\u6742\u4e00\u4e9b\u3002<\/p>\n<pre><code>@RestController\npublic\u00a0class\u00a0OldCenterSpuController\u00a0{\n\u00a0 \u00a0\u00a0@Resource\n\u00a0 \u00a0\u00a0private\u00a0NewSpuApplyCheckServiceImpl\u00a0newSpuApplyCheckServiceImpl;\n}\n@RestController\npublic\u00a0class\u00a0TimeoutNotifyController\u00a0{\n\u00a0 \u00a0\u00a0@Resource\n\u00a0 \u00a0\u00a0private\u00a0SpuCheckDomainServiceImpl\u00a0spuCheckDomainServiceImpl;\n}\n@Component\npublic\u00a0class\u00a0NewSpuApplyCheckServiceImpl\u00a0{\n\u00a0 \u00a0\u00a0@Resource\n\u00a0 \u00a0\u00a0private\u00a0SpuCheckDomainServiceImpl\u00a0spuCheckDomainServiceImpl;\n}\n@Component\n@Slf4j\n@Validated\npublic\u00a0class\u00a0SpuCheckDomainServiceImpl\u00a0{\n\u00a0 \u00a0\u00a0@Resource\n\u00a0 \u00a0\u00a0private\u00a0NewSpuApplyCheckServiceImpl\u00a0newSpuApplyCheckServiceImpl;\n}<\/code><\/pre>\n<p>\u4ece\u4ee3\u7801\u770b\uff0c\u4e3b\u8981\u662fSpuCheckDomainServiceImpl\u548cNewSpuApplyCheckServiceImpl \u6784\u6210\u4e86\u4e00\u4e2a\u4f9d\u8d56\u73af\u3002\u800c\u6211\u4eec\u4ece\u6b63\u5e38\u542f\u52a8\u7684bean\u52a0\u8f7d\u987a\u5e8f\u53d1\u73b0\u9996\u5148\u662f\u4eceOldCenterSpuController\u5f00\u59cb\u52a0\u8f7d\u7684\uff0c\u5177\u4f53\u60c5\u51b5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code>OldCenterSpuController\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56)\nNewSpuApplyCheckServiceImpl\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56) \u00a0\nSpuCheckDomainServiceImpl\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56)\nNewSpuApplyCheckServiceImpl\u00a0<\/code><\/pre>\n<p>\u5f02\u5e38\u542f\u52a8\u7684\u60c5\u51b5bean\u52a0\u8f7d\u662f\u4eceTimeoutNotifyController\u5f00\u59cb\u52a0\u8f7d\u7684\uff0c\u5177\u4f53\u60c5\u51b5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code>TimeoutNotifyController\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56)\nSpuCheckDomainServiceImpl\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56) \u00a0\nNewSpuApplyCheckServiceImpl\u00a0\n\u00a0 \u00a0 \u2193 (\u4f9d\u8d56)\nSpuCheckDomainServiceImpl\u00a0<\/code><\/pre>\n<p>\u540c\u4e00\u4e2a\u4f9d\u8d56\u73af\uff0c\u4e3a\u4ec0\u4e48\u4eceOldCenterSpuController \u5f00\u59cb\u52a0\u8f7d\u5c31\u53ef\u4ee5\u6b63\u5e38\u542f\u52a8\uff0c\u800c\u4eceTimeoutNotifyController \u542f\u52a8\u5c31\u4f1a\u542f\u52a8\u5f02\u5e38\u5462\uff1f\u4e0b\u9762\u6211\u4eec\u4f1a\u4ece\u73b0\u573adebug\u7684\u89d2\u5ea6\u6765\u5206\u6790\u89e3\u91ca\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<h2>3.2 \u95ee\u9898\u5206\u6790<\/h2>\n<p>\u5728\u76f8\u5173\u77e5\u8bc6\u70b9\u7b80\u4ecb\u91cc\u9762\u77e5\u6089\u5230spring\u7528\u4e09\u7ea7\u7f13\u5b58\u89e3\u51b3\u4e86\u5faa\u73af\u4f9d\u8d56\u95ee\u9898\u3002\u4e3a\u4ec0\u4e48\u540e\u53f0\u670d\u52a1admin\u542f\u52a8\u8fd8\u4f1a\u62a5\u5faa\u73af\u4f9d\u8d56\u7684\u95ee\u9898\u5462\uff1f<\/p>\n<p>\u8981\u5f97\u5230\u95ee\u9898\u7684\u7b54\u6848\uff0c\u8fd8\u662f\u9700\u8981\u56de\u5230\u6e90\u7801\u672c\u8eab\uff0c\u524d\u9762\u6211\u4eec\u5206\u6790\u4e86spring\u7684\u521b\u5efaBean\u7684\u4e3b\u8981\u6d41\u7a0b\uff0c\u8fd9\u91cc\u4e3a\u4e86\u66f4\u597d\u7684\u5206\u6790\u95ee\u9898\uff0c\u8865\u5145\u4e0b\u901a\u8fc7\u5bb9\u5668\u83b7\u53d6Bean\u7684\u3002<\/p>\n<p>\u5728\u901a\u8fc7spring\u5bb9\u5668\u83b7\u53d6bean\u65f6\uff0c\u5e95\u5c42\u7edf\u4e00\u4f1a\u8c03\u7528doGetBean\u65b9\u6cd5\uff0c\u5927\u4f53\u5982\u4e0b\uff1a<\/p>\n<pre><code>protected\u00a0&lt;T&gt; T\u00a0doGetBean(final\u00a0String name,\u00a0@Nullable\u00a0final\u00a0Class&lt;T&gt; requiredType,\n\u00a0 \u00a0 \u00a0 \u00a0@Nullable\u00a0final\u00a0Object[] args,\u00a0boolean\u00a0typeCheckOnly)\u00a0throws\u00a0BeansException {\n\u00a0 \u00a0\u00a0\n\u00a0 \u00a0\u00a0final\u00a0String\u00a0beanName\u00a0=\u00a0transformedBeanName(name);\n\u00a0 \u00a0 Object bean;\n\u00a0 \u00a0\u00a0\n\u00a0 \u00a0\u00a0\/\/ \u4ece\u4e09\u7ea7\u7f13\u5b58\u83b7\u53d6bean\n\u00a0 \u00a0\u00a0Object\u00a0sharedInstance\u00a0=\u00a0getSingleton(beanName);\n\u00a0 \u00a0\u00a0if\u00a0(sharedInstance !=\u00a0null\u00a0&amp;&amp; args ==\u00a0null) {\n\u00a0 \u00a0 \u00a0 \u00a0bean = getObjectForBeanInstance(sharedInstance, name, beanName,\u00a0null);\n\u00a0 \u00a0 }else\u00a0{\n\u00a0 \u00a0 \u00a0if\u00a0(mbd.isSingleton()) {\n\u00a0 \u00a0 \u00a0 \u00a0sharedInstance = getSingleton(beanName, () -&gt; {\n\u00a0 \u00a0 \u00a0 \u00a0try\u00a0{\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/\u5982\u679c\u662f\u5355\u4f8bBean\uff0c\u4ece\u4e09\u7ea7\u7f13\u5b58\u6ca1\u6709\u83b7\u53d6\u5230bean\uff0c\u5219\u6267\u884c\u521b\u5efabean\u903b\u8f91\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0return\u00a0createBean(beanName, mbd, args);\n\u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 \u00a0 \u00a0catch\u00a0(BeansException ex) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 destroySingleton(beanName);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0throw\u00a0ex;\n\u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 });\n\u00a0 \u00a0 bean = getObjectForBeanInstance(sharedInstance, name, beanName, mbd);\n\u00a0 } \u00a0\u00a0\n\u00a0}<\/code><\/pre>\n<p>\u4ecedoGetBean\u65b9\u6cd5\u903b\u8f91\u770b\uff0c\u5728spring\u4ece\u4e00\u4e8c\u4e09\u7ea7\u7f13\u5b58\u83b7\u53d6bean\u8fd4\u56de\u7a7a\u65f6\uff0c\u4f1a\u8c03\u7528createBean\u65b9\u6cd5\u53bb\u573a\u666fbean\uff0ccreateBean\u65b9\u6cd5\u5e95\u5c42\u4e3b\u8981\u662f\u8c03\u7528\u524d\u9762\u6211\u4eec\u63d0\u5230\u7684\u521b\u5efaBean\u6d41\u7a0b\u7684doCreateBean\u65b9\u6cd5\u3002<\/p>\n<p>\u6ce8\u610f\uff1adoGetBean\u65b9\u6cd5\u91cc\u9762getSingleton\u65b9\u6cd5\u7684\u903b\u8f91\u662f\u5148\u4ece\u4e00\u7ea7\u7f13\u5b58\u62ff\uff0c\u62ff\u5230\u4e3a\u7a7a\u5e76\u4e14bean\u5728\u521b\u5efa\u4e2d\u5219\u53c8\u4ece\u4e8c\u7ea7\u7f13\u5b58\u62ff\uff0c\u4e8c\u7ea7\u7f13\u5b58\u62ff\u5230\u4e3a\u7a7a \u5e76\u4e14\u5f53\u524d\u5bb9\u5668\u5141\u8bb8\u6709\u5faa\u73af\u4f9d\u8d56\u5219\u4ece\u4e09\u7ea7\u7f13\u5b58\u62ff\u3002\u5e76\u4e14\u5c06\u5bf9\u8c61\u5de5\u5382\u79fb\u5230\u4e8c\u7ea7\u7f13\u5b58\uff0c\u5220\u9664\u4e09\u7ea7\u7f13\u5b58<\/p>\n<p>doCreateBean\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>protected\u00a0Object\u00a0doCreateBean(final\u00a0String\u00a0beanName, final\u00a0RootBeanDefinition\u00a0mbd, final\u00a0@Nullable\u00a0Object[] args)\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 throws\u00a0BeanCreationException\u00a0{\n\u00a0 \u00a0\u00a0if\u00a0(mbd.isSingleton()) {\n\u00a0 \u00a0 \u00a0 instanceWrapper =\u00a0this.factoryBeanInstanceCache.remove(beanName);\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\/\/ Bean\u521d\u59cb\u5316\u7b2c\u4e00\u6b65\uff1a\u9ed8\u8ba4\u8c03\u7528\u65e0\u53c2\u6784\u9020\u5b9e\u4f8b\u5316Bean\n\u00a0 \u00a0\u00a0\/\/ \u5982\u679c\u662f\u53ea\u6709\u5e26\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u6784\u9020\u65b9\u6cd5\u91cc\u7684\u53c2\u6570\u4f9d\u8d56\u6ce8\u5165\uff0c\u5c31\u662f\u53d1\u751f\u5728\u8fd9\u4e00\u6b65\n\u00a0 \u00a0\u00a0if\u00a0(instanceWrapper ==\u00a0null) {\n\u00a0 \u00a0 \u00a0 instanceWrapper =\u00a0createBeanInstance(beanName, mbd, args);\n\u00a0 \u00a0 }\n\n\n\u00a0 \u00a0\u00a0\/\/\u5224\u65adBean\u662f\u5426\u9700\u8981\u63d0\u524d\u66b4\u9732\u5bf9\u8c61\u7528\u6765\u89e3\u51b3\u5faa\u73af\u4f9d\u8d56\uff0c\u9700\u8981\u5219\u542f\u52a8spring\u4e09\u7ea7\u7f13\u5b58\n\u00a0 \u00a0\u00a0boolean\u00a0earlySingletonExposure = (mbd.isSingleton() &amp;&amp;\u00a0this.allowCircularReferences\u00a0&amp;&amp;\n\u00a0 \u00a0 \u00a0 \u00a0isSingletonCurrentlyInCreation(beanName));\n\u00a0 \u00a0if\u00a0(earlySingletonExposure) {\n\u00a0 \u00a0 \u00a0if\u00a0(logger.isTraceEnabled()) {\n\u00a0 \u00a0 \u00a0 \u00a0logger.trace(&quot;Eagerly caching bean '&quot;\u00a0+ beanName +\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;' to allow for resolving potential circular references&quot;);\n\u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0addSingletonFactory(beanName, () -&gt;\u00a0getEarlyBeanReference(beanName, mbd, bean));\n}\n\n\n\u00a0 \u00a0\u00a0\/\/ Initialize the bean instance.\n\u00a0 \u00a0\u00a0Object\u00a0exposedObject = bean;\n\u00a0 \u00a0\u00a0try\u00a0{\n\u00a0 \u00a0 \u00a0\u00a0\/\/ bean\u521b\u5efa\u7b2c\u4e8c\u6b65\uff1a\u586b\u5145\u5c5e\u6027\uff08DI\u4f9d\u8d56\u6ce8\u5165\u53d1\u751f\u5728\u6b64\u6b65\u9aa4\uff09\n\u00a0 \u00a0 \u00a0\u00a0populateBean(beanName, mbd, instanceWrapper);\n\u00a0 \u00a0 \u00a0\u00a0\/\/ bean\u521b\u5efa\u7b2c\u4e09\u6b65\uff1a\u8c03\u7528\u521d\u59cb\u5316\u65b9\u6cd5\uff0c\u5b8c\u6210bean\u7684\u521d\u59cb\u5316\u64cd\u4f5c\uff08AOP\u7684\u7b2c\u4e09\u4e2a\u5165\u53e3\uff09\n\u00a0 \u00a0 \u00a0\u00a0\/\/ AOP\u662f\u901a\u8fc7\u81ea\u52a8\u4ee3\u7406\u521b\u5efa\u5668AbstractAutoProxyCreator\u7684postProcessAfterInitialization()\n\/\/\u65b9\u6cd5\u7684\u6267\u884c\u8fdb\u884c\u4ee3\u7406\u5bf9\u8c61\u7684\u521b\u5efa\u7684,AbstractAutoProxyCreator\u662fBeanPostProcessor\u63a5\u53e3\u7684\u5b9e\u73b0\n\u00a0 \u00a0 \u00a0 exposedObject =\u00a0initializeBean(beanName, exposedObject, mbd);\n\n\n\n\n\u00a0 \u00a0if\u00a0(earlySingletonExposure) {\n\u00a0 \u00a0\u00a0Object\u00a0earlySingletonReference =\u00a0getSingleton(beanName,\u00a0false);\n\u00a0 \u00a0 \u00a0if\u00a0(earlySingletonReference !=\u00a0null) {\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0if\u00a0(exposedObject == bean) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 exposedObject = earlySingletonReference;\n\u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0else\u00a0if\u00a0(!this.allowRawInjectionDespiteWrapping\u00a0&amp;&amp;\u00a0hasDependentBean(beanName)) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0String[] dependentBeans =\u00a0getDependentBeans(beanName);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0Set&lt;String&gt; actualDependentBeans =\u00a0new\u00a0LinkedHashSet&lt;&gt;(dependentBeans.length);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0for\u00a0(String\u00a0dependentBean : dependentBeans) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0if\u00a0(!removeSingletonIfCreatedForTypeCheckOnly(dependentBean)) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 actualDependentBeans.add(dependentBean);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0if\u00a0(!actualDependentBeans.isEmpty()) {\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0throw\u00a0new\u00a0BeanCurrentlyInCreationException(beanName,\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;Bean with name '&quot;\u00a0+ beanName +\u00a0&quot;' has been injected into other beans [&quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0StringUtils.collectionToCommaDelimitedString(actualDependentBeans) +\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;] in its raw version as part of a circular reference, but has eventually been &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;wrapped. This means that said other beans do not use the final version of the &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;bean. This is often the result of over-eager type matching - consider using &quot;\u00a0+\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&quot;'getBeanNamesOfType' with the 'allowEagerInit' flag turned off, for example.&quot;);\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }\n\u00a0 \u00a0 \u00a0 \u00a0}\n\u00a0 \u00a0 }\n}\n\n\n\u00a0 \u00a0 }\u00a0catch\u00a0(Throwable\u00a0ex) {\n\u00a0 \u00a0 \u00a0\u00a0\/\/ ...\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\/\/ ...\n\u00a0 \u00a0\u00a0return\u00a0exposedObject;\n\u00a0 \u00a0 }<\/code><\/pre>\n<p>\u5c06doGetBean\u548cdoCreateBean\u7684\u903b\u8f91\u8f6c\u6362\u6210\u6d41\u7a0b\u56fe\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"790\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8F\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u4ece\u6d41\u7a0b\u56fe\u53ef\u4ee5\u770b\u51fa\uff0c\u540e\u53f0\u670d\u52a1admin\u542f\u52a8\u5931\u8d25\u629b\u51faUnsatisfiedDependencyException\u5f02\u5e38\u7684\u5fc5\u8981\u6761\u4ef6\u662f\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\uff0c\u56e0\u4e3a\u4e0d\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u7684\u60c5\u51b5bean\u53ea\u4f1a\u5b58\u5728\u5355\u6b21\u52a0\u8f7d\uff0c\u5355\u6b21\u52a0\u8f7d\u7684\u60c5\u51b5bean\u53ea\u4f1a\u88ab\u653e\u8fdbspring\u7684\u7b2c\u4e09\u7ea7\u7f13\u5b58\u3002<\/p>\n<p>\u800c\u89e6\u53d1UnsatisfiedDependencyException\u5f02\u5e38\u7684\u5148\u51b3\u6761\u4ef6\u662f\u9700\u8981spring\u7684\u7b2c\u4e00\u4e8c\u7ea7\u7f13\u5b58\u6709\u5f53\u524d\u7684bean\u3002\u6240\u4ee5\u53ef\u4ee5\u77e5\u9053\u5f53\u524dbean\u80af\u5b9a\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u3002\u5728\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\u7684\u60c5\u51b5\u4e0b\uff0c\u5f53\u524dbean\u88ab\u7b2c\u4e00\u6b21\u83b7\u53d6\uff08\u5373\u8c03\u7528doGetBean\u65b9\u6cd5\uff09\u4f1a\u7f13\u5b58\u8fdbspring\u7684\u7b2c\u4e09\u7ea7\u7f13\u5b58\uff0c\u7136\u540e\u4f1a\u6ce8\u5165\u5f53\u524dbean\u7684\u4f9d\u8d56\uff08\u5373\u8c03\u7528populateBean\u65b9\u6cd5\uff09\uff0c\u5728\u5f53\u524dbean\u6240\u5728<strong>\u4f9d\u8d56\u73af\u5185\u5176\u4ed6bean\u90fd\u4e0d\u5728\u4e00\u4e8c\u7ea7\u7f13\u5b58\u7684\u60c5\u51b5\u4e0b<\/strong>\uff0c\u4f1a\u89e6\u53d1\u5f53\u524dbean\u7684\u7b2c\u4e8c\u6b21\u83b7\u53d6\uff08\u5373\u8c03\u7528doGetBean\u65b9\u6cd5\uff09\uff0c\u7531\u4e8e\u7b2c\u4e00\u6b21\u83b7\u53d6\u5df2\u7ecf\u5c06Bean\u653e\u8fdb\u4e86\u7b2c\u4e09\u7ea7\u7f13\u5b58\uff0cspring\u4f1a\u5c06Bean\u4ece\u7b2c\u4e09\u7ea7\u7f13\u5b58\u79fb\u5230\u4e8c\u7ea7\u7f13\u5b58\u5e76\u5220\u9664\u7b2c\u4e09\u7ea7\u7f13\u5b58\u3002<\/p>\n<p>\u6700\u7ec8\u4f1a\u56de\u5230\u7b2c\u4e00\u6b21\u83b7\u53d6\u7684\u6d41\u7a0b\uff0c\u8c03\u7528\u521d\u59cb\u5316\u65b9\u6cd5\u505a\u521d\u59cb\u5316\u3002\u6700\u7ec8\u5728\u521d\u59cb\u5316\u6709\u5bf9\u5f53\u524dbean\u505a\u4ee3\u7406\u589e\u5f3a\u7684\u5e76\u4e14\u63d0\u524d\u66b4\u9732\u5230\u4e8c\u7ea7\u7f13\u5b58\u7684\u5bf9\u8c61\u6709\u88ab\u5176\u4ed6\u4f9d\u8d56\u5f15\u7528\u5230\uff0c\u800c\u4e14allowRawInjectionDespiteWrapping=false\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u5bfc\u81f4\u629b\u51faUnsatisfiedDependencyException\uff0c\u8fdb\u800c\u5bfc\u81f4\u542f\u52a8\u5f02\u5e38\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u5728\u6ce8\u5165\u5f53\u524dbean\u7684\u4f9d\u8d56\u65f6\uff0c\u8fd9\u91ccspring\u5c06Bean\u4ece\u7b2c\u4e09\u7ea7\u7f13\u5b58\u79fb\u5230\u4e8c\u7ea7\u7f13\u5b58\u5e76\u5220\u9664\u7b2c\u4e09\u7ea7\u7f13\u5b58\u540e\uff0c\u5f53\u524dbean\u7684\u4f9d\u8d56\u7684\u5176\u4ed6bean\u4f1a\u4ece\u4e8c\u7ea7\u7f13\u5b58\u62ff\u5230\u5f53\u524dbean\u505a\u4f9d\u8d56\u3002\u8fd9\u4e5f\u662f\u540e\u7eed\u629b\u5f02\u5e38\u7684\u5148\u51b3\u6761\u4ef6<\/p>\n<p>\u7ed3\u5408admin\u6709\u65f6\u5019\u542f\u52a8\u6b63\u5e38\uff0c\u6709\u65f6\u5019\u542f\u52a8\u5f02\u5e38\u7684\u60c5\u51b5\uff0c\u8fd9\u91cc\u731c\u6d4b\u542f\u52a8\u6b63\u5e38\u548c\u542f\u52a8\u5f02\u5e38\u65f6bean\u52a0\u8f7d\u987a\u5e8f\u4e0d\u4e00\u81f4\uff0c\u8fdb\u800c\u5bfc\u81f4\u542f\u52a8\u6b63\u5e38\u65f6\u5f53\u524dBean\u53ea\u4f1a\u88ab\u83b7\u53d6\u4e00\u6b21\uff0c\u542f\u52a8\u5f02\u5e38\u65f6\u5f53\u524dbean\u4f1a\u88ab\u83b7\u53d6\u4e24\u6b21\u3002\u4e3a\u4e86\u9a8c\u8bc1\u731c\u60f3\uff0c\u6211\u4eec\u5206\u522b\u9488\u5bf9\u542f\u52a8\u5f02\u5e38\u548c\u542f\u52a8\u6b63\u5e38\u7684bean\u83b7\u53d6\u505a\u4e86debug\u3002<\/p>\n<p><strong>debug\u5206\u6790<\/strong><\/p>\n<p>\u9996\u5148\u6211\u4eec\u4ece\u542f\u52a8\u5f02\u5e38\u63d0\u53d6\u5230\u4ee5\u4e0b\u5173\u952e\u4fe1\u606f\uff0c\u4ece\u8fd9\u4e9b\u4fe1\u606f\u53ef\u4ee5\u77e5\u9053\u662fspuCheckDomainServiceImpl\u7684\u52a0\u8f7d\u89e6\u53d1\u7684\u542f\u52a8\u5f02\u5e38\u3002\u6240\u4ee5\u6211\u4eec\u8fd9\u91cc\u4ee5spuCheckDomainServiceImpl\u4f5c\u4e3a\u524d\u9762\u6d41\u7a0b\u5206\u6790\u7684\u5f53\u524dbean\u3002<\/p>\n<pre><code>org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean\u00a0with\u00a0name\u00a0'timeoutNotifyController': Injection of resource dependencies failed; nested exception\u00a0is\u00a0org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean\u00a0with\u00a0name\u00a0'spuCheckDomainServiceImpl': Bean\u00a0with\u00a0name\u00a0'spuCheckDomainServiceImpl'\u00a0has been injected\u00a0into\u00a0other beans [...]\u00a0in\u00a0its raw version\u00a0as\u00a0part of a circular reference, but has eventually been wrapped. This means that said other beans\u00a0do\u00a0not\u00a0use the final version of the bean. This\u00a0is\u00a0often the result of over-eager type matching - consider\u00a0using\u00a0'getBeanNamesOfType'\u00a0with\u00a0the\u00a0'allowEagerInit'\u00a0flag turned off,\u00a0for\u00a0example.<\/code><\/pre>\n<p>\u7136\u540e\u63d0\u524d\u6211\u4eec\u5728doCreateBean\u65b9\u6cd5\u8bbe\u7f6e\u597dspuCheckDomainServiceImpl\u52a0\u8f7d\u65f6\u7684\u6761\u4ef6\u65ad\u70b9\u3002\u6211\u4eec\u5148debug\u542f\u52a8\u5f02\u5e38\u7684\u60c5\u51b5\u3002\u6700\u7ec8\u65ad\u70b9\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"415\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8G\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u4ece\u7ea2\u68461\u91cc\u9762\u7684\u4e24\u4e2a\u5f15\u7528\u770b\uff0c\u5f88\u660e\u663e\u8c03initializeBean\u65b9\u6cd5\u65f6spring\u6709\u5bf9spuCheckDomainServiceImpl\u505a\u4ee3\u7406\u589e\u5f3a\u3002\u5bfc\u81f4initializeBean\u540e\u8fd4\u56de\u7684\u5f15\u7528\u548c\u63d0\u524d\u66b4\u9732\u5230\u4e8c\u7ea7\u7f13\u5b58\u7684\u5f15\u7528\u662f\u4e0d\u4e00\u81f4\u7684\u3002\u8fd9\u91ccspuCheckDomainServiceImpl\u6709\u4e8c\u7ea7\u7f13\u5b58\u662f\u8ddf\u6211\u4eec\u524d\u9762\u5206\u6790\u7684\u543b\u5408\uff0c\u662f\u56e0\u4e3aspuCheckDomainServiceImpl\u88ab\u83b7\u53d6\u4e86\u4e24\u6b21\uff0c\u5373\u8c03\u4e86\u4e24\u6b21doGetBean\u3002<\/p>\n<p>\u4ece\u7ea2\u68462\u91cc\u9762\u7684actualDependentBeans\u7684set\u96c6\u5408\u77e5\u9053\u63d0\u524d\u66b4\u9732\u5230\u4e8c\u7ea7\u7f13\u5b58\u7684\u5f15\u7528\u6709\u88ab\u5176\u4ed633\u4e2abean\u5f15\u7528\u5230\uff0c\u4e5f\u662f\u8ddf\u5f02\u5e38\u63d0\u793a\u7684bean\u5217\u8868\u4fdd\u6301\u4e00\u81f4\u7684\u3002<\/p>\n<p><strong>\u8fd9\u91ccspuCheckDomainServiceImpl\u7684\u52a0\u8f7d\u4e3a\u4ec0\u4e48\u4f1a\u8c03\u7528\u4e24\u6b21doGetBean\u65b9\u6cd5\u5462\uff1f<\/strong><\/p>\n<p>\u4ece\u8c03\u7528\u6808\u5206\u6790\u5230\u8be5\u52a0\u8f7d\u94fe\u5982\u4e0b\uff1a<\/p>\n<pre><code>TimeoutNotifyController\u00a0 -&gt;spuCheckDomainServiceImpl-&gt; newSpuApplyCheckServiceImpl-&gt; ... -&gt;spuCheckDomainServiceImpl<\/code><\/pre>\n<p>TimeoutNotifyController\u6ce8\u5165\u4f9d\u8d56\u65f6\u7b2c\u4e00\u6b21\u8c03\u7528doGetBean\u83b7\u53d6spuCheckDomainServiceImpl\u65f6\uff0c\u4ece\u4e00\u4e8c\u4e09\u7ea7\u7f13\u5b58\u83b7\u53d6\u4e0d\u5230\uff0c\u4f1a\u8c03\u7528doCreateBean\u65b9\u6cd5\u521b\u5efaspuCheckDomainServiceImpl\u3002<\/p>\n<p>\u9996\u5148\u4f1a\u5c06spuDomainServiceImpl\u653e\u8fdbspring\u7684\u7b2c\u4e09\u7ea7\u7f13\u5b58\uff0c\u7136\u540e\u5f00\u59cb\u8c03populateBean\u65b9\u6cd5\u6ce8\u5165\u4f9d\u8d56\uff0c\u7531\u4e8e\u5728\u5faa\u73af\u4e2d\u95f4\u7684newSpuApplyCheckServiceImpl\u662f\u7b2c\u4e00\u6b21\u83b7\u53d6\uff0c\u4e00\u4e8c\u4e09\u7ea7\u7f13\u5b58\u90fd\u83b7\u53d6\u4e0d\u5230\uff0c\u4f1a\u8c03\u7528doCreateBean\u53bb\u521b\u5efa\u5bf9\u5e94\u7684bean\uff0c\u7136\u540e\u4f1a\u7b2c\u4e8c\u6b21\u8c03\u7528doGetBean\u83b7\u53d6spuCheckDomainServiceImpl\uff0c\u8fd9\u65f6spuCheckDomainServiceImpl\u5728\u7b2c\u4e00\u6b21\u83b7\u53d6\u5df2\u7ecf\u5c06bean\u52a0\u8f7d\u5230\u7b2c\u4e09\u7ea7\u7f13\u5b58\uff0c\u6240\u4ee5\u8fd9\u6b21spring\u4f1a\u5c06bean\u4ece\u7b2c\u4e09\u7ea7\u7f13\u5b58\u76f4\u63a5\u79fb\u5230\u7b2c\u4e8c\u7ea7\u7f13\u5b58\uff0c\u5e76\u5c06\u7b2c\u4e09\u7ea7\u7f13\u5b58\u91cc\u9762\u7684spuCheckDomainServiceImpl\u5bf9\u5e94\u7684bean\u5220\u9664\uff0c\u5e76\u76f4\u63a5\u8fd4\u56de\u4e8c\u7ea7\u7f13\u5b58\u91cc\u9762\u7684bean\uff0c\u4e0d\u4f1a\u518d\u8c03doCreateBean\u53bb\u521b\u5efaspuCheckDomainServiceImpl\u3002\u6700\u7ec8\u5b8c\u6210\u4e86\u5faa\u73af\u4e2d\u95f4\u7684bean\u7684\u521d\u59cb\u5316\u540e\uff08\u8fd9\u91cc\u5faa\u73af\u4e2d\u95f4\u7684bean\u521d\u59cb\u5316\u65f6\u4f9d\u8d56\u5230\u7684bean\u5982\u679c\u6709\u5f15\u7528\u5230spuCheckDomainServiceImpl\u4f1a\u8c03\u7528doGetBean\u65b9\u6cd5\u4ece\u4e8c\u7ea7\u7f13\u5b58\u62ff\u5230spuCheckDomainServiceImpl\u63d0\u524d\u66b4\u9732\u7684\u5f15\u7528\uff09\uff0c\u4f1a\u56de\u5230\u7b2c\u4e00\u6b21\u8c03\u7528doGetBean\u83b7\u53d6spuCheckDomainServiceImpl\u65f6\u8c03\u7528\u7684doCreateBean\u65b9\u6cd5\u7684\u6d41\u7a0b\u3002\u7ee7\u7eed\u8c03initializeBean\u65b9\u6cd5\u5b8c\u6210\u521d\u59cb\u5316\uff0c\u7136\u540e\u5c06\u521d\u59cb\u5316\u5b8c\u6210\u7684bean\u8fd4\u56de\u3002\u6700\u7ec8\u62ff\u521d\u59cb\u5316\u8fd4\u56de\u7684bean\u5f15\u7528\u8ddf\u4e8c\u7ea7\u7f13\u5b58\u62ff\u5230\u7684bean\u5f15\u7528\u505a\u5bf9\u6bd4\uff0c\u53d1\u73b0\u4e0d\u4e00\u81f4\uff0c\u5bfc\u81f4\u629b\u51faUnsatisfiedDependencyException\u5f02\u5e38\u3002<\/p>\n<p><strong>\u90a3\u4e48\u8fd9\u91cc\u4e3a\u4ec0\u4e48spuCheckDomainServiceImpl\u8c03\u7528initializeBean\u65b9\u6cd5\u5b8c\u6210\u521d\u59cb\u5316\u540e\u4e0e\u63d0\u524d\u66b4\u9732\u5230\u4e8c\u7ea7\u7f13\u5b58\u7684bean\u4f1a\u4e0d\u4e00\u81f4\u5462\uff1f<\/strong><\/p>\n<p>\u770bspuCheckDomainServiceImpl\u7684\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code>@Component\n@Slf4j\n@Validated\npublic\u00a0class\u00a0SpuCheckDomainServiceImpl\u00a0{\n\u00a0 \u00a0\u00a0@Resource\n\u00a0 \u00a0\u00a0private\u00a0NewSpuApplyCheckServiceImpl\u00a0newSpuApplyCheckServiceImpl;\n}<\/code><\/pre>\n<p>\u53d1\u73b0SpuCheckDomainServiceImpl\u7c7b\u6709\u4f7f\u7528\u5230 <strong>@Validated<\/strong>\u6ce8\u89e3\u3002\u67e5\u9605\u8d44\u6599\u53d1\u73b0 <strong>@Validated<\/strong>\u7684\u5b9e\u73b0\u662f\u901a\u8fc7\u5728initializeBean\u65b9\u6cd5\u91cc\u9762\u6267\u884c\u4e00\u4e2aorg.springframework.validation.beanvalidation.MethodValidationPostProcessor\u540e\u7f6e\u5904\u7406\u5668\u5b9e\u73b0\u7684\uff0cMethodValidationPostProcessor\u4f1a\u5bf9SpuCheckDomainServiceImpl\u505a\u4e00\u5c42\u4ee3\u7406\u3002\u5bfc\u81f4initializeBean\u65b9\u6cd5\u8fd4\u56de\u7684spuCheckDomainServiceImpl\u662f\u4e00\u4e2a\u65b0\u7684\u4ee3\u7406\u5bf9\u8c61\uff0c\u4ece\u800c\u6700\u7ec8\u5bfc\u81f4\u8ddf\u4e8c\u7ea7\u7f13\u5b58\u7684\u4e0d\u4e00\u81f4\u3002<\/p>\n<p>debug\u89c6\u56fe\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"141\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8I\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p><strong>\u90a3\u4e3a\u4ec0\u4e48\u6709\u65f6\u5019\u80fd\u542f\u52a8\u6210\u529f\u5462\uff1f\u4ec0\u4e48\u60c5\u51b5\u4e0b\u80fd\u542f\u52a8\u6210\u529f\uff1f<\/strong><\/p>\n<p>\u6211\u4eec\u7ee7\u7eeddebug\u542f\u52a8\u6210\u529f\u7684\u60c5\u51b5\u3002\u6700\u7ec8\u89c2\u5bdf\u5230spuCheckDomainServiceImpl\u53ea\u4f1a\u8c03\u7528\u4e00\u6b21<strong>doGetBean<\/strong>\uff0c\u800c\u4e14\u4ece\u4e00\u4e8c\u7ea7\u7f13\u5b58\u62ff\u5230\u7684spuCheckDomainServiceImpl\u63d0\u524d\u66b4\u9732\u7684\u5f15\u7528\u4e3anull\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"338\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdmN8J\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u91cc\u4e3a\u4ec0\u4e48spuCheckDomainServiceImpl\u53ea\u4f1a\u8c03\u7528\u4e00\u6b21<strong>doGetBean<\/strong>\u5462\uff1f<\/p>\n<p>\u9996\u5148\u6211\u4eec\u6839\u636e\u8c03\u7528\u6808\u6574\u7406\u5230\u5f53\u524d\u52a0\u8f7d\u7684\u5f15\u7528\u6808\uff1a<\/p>\n<pre><code>oldCenterSpuController-&gt;\u00a0newSpuApplyCheckServiceImpl-&gt; ... -&gt;spuCheckDomainServiceImpl -&gt; newSpuApplyCheckServiceImpl<\/code><\/pre>\n<p>\u6839\u636e\u524d\u9762\u542f\u52a8\u5931\u8d25\u7684\u4fe1\u606f\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff0c<strong>spuCheckDomainServiceImpl<\/strong>\u5904\u7406\u4f9d\u8d56\u7684\u73af\u662f\uff1a<\/p>\n<pre><code>spuCheckDomainServiceImpl\u00a0-&gt;newSpuApplyCommandServiceImpl-&gt; ... -&gt;spuCheckDomainServiceImpl<\/code><\/pre>\n<p>\u5931\u8d25\u7684\u60c5\u51b5\u6211\u4eec\u53d1\u73b0\u662f\u4ecespuCheckDomainServiceImpl\u5f00\u59cb\u521b\u5efa\u7684\uff0c\u73b0\u5728\u542f\u52a8\u6b63\u5e38\u7684\u60c5\u51b5\u662f\u4ecenewSpuApplyCheckServiceImpl\u5f00\u59cb\u521b\u5efa\u7684\u3002<\/p>\n<p>\u521b\u5efa newSpuApplyCheckServiceImpl\u65f6\uff0c\u53d1\u73b0\u5b83\u4f9d\u8d56\u73af\u4e2d\u95f4\u8fd9\u4e9bbean\u4f1a\u4f9d\u6b21\u8c03\u7528doCreateBean\u65b9\u6cd5\u53bb\u521b\u5efa\u5bf9\u5e94\u7684bean\u3002<\/p>\n<p>\u8c03\u7528\u5230spuCheckDomainServiceImpl\u65f6\uff0c\u7531\u4e8e\u662f\u7b2c\u4e00\u6b21\u83b7\u53d6bean\uff0c\u4e5f\u4f1a\u8c03\u7528doCreateBean\u65b9\u6cd5\u521b\u5efabean\uff0c\u7136\u540e\u56de\u5230\u521b\u5efaspuCheckDomainServiceImpl\u7684doCreateBean\u6d41\u7a0b\uff0c\u8fd9\u91cc\u7531\u4e8e\u6ca1\u6709\u5c06spuCheckDomainServiceImpl\u7684\u4e09\u7ea7\u7f13\u5b58\u79fb\u5230\u4e8c\u7ea7\u7f13\u5b58\uff0c\u6240\u4ee5\u4e0d\u4f1a\u5bfc\u81f4\u629b\u51faUnsatisfiedDependencyException\u5f02\u5e38\uff0c\u6700\u7ec8\u56de\u5230newSpuApplyCheckServiceImpl\u7684doCreateBean\u6d41\u7a0b\uff0c\u7531\u4e8enewSpuApplyCheckServiceImpl\u5728\u8c03\u7528initializeBean\u65b9\u6cd5\u6ca1\u6709\u505a\u4ee3\u7406\u589e\u5f3a\uff0c\u6240\u4ee5\u4e5f\u4e0d\u4f1a\u5bfc\u81f4\u629b\u51faUnsatisfiedDependencyException\u5f02\u5e38\u3002\u56e0\u6b64\u6700\u540e\u53ef\u4ee5\u6b63\u5e38\u542f\u52a8\u3002<\/p>\n<p><strong>\u8fd9\u91cc\u6211\u4eec\u4f1a\u6709\u7591\u95ee\uff1f\u7c7b\u7684\u521b\u5efa\u987a\u5e8f\u7531\u4ec0\u4e48\u51b3\u5b9a\u7684\u5462\uff1f<\/strong><\/p>\n<p>\u901a\u5e38\u4e0d\u540c\u73af\u5883\u4e0b\uff0c\u4ee3\u7801\u6253\u5305\u540e\u7684jar\/war\u7ed3\u6784\u3001@ComponentScan\u7684basePackages\u914d\u7f6e\u7ec6\u5fae\u5dee\u522b\uff0c\u90fd\u53ef\u80fd\u5bfc\u81f4Spring\u626b\u63cf\u548c\u6ce8\u518cBean\u5b9a\u4e49\u7684\u987a\u5e8f\u4e0d\u540c\u3002Java ClassLoader\u52a0\u8f7d\u7c7b\u7684\u987a\u5e8f\u672c\u8eab\u4e5f\u6709\u4e00\u5b9a\u4e0d\u786e\u5b9a\u6027\u3002\u5982\u679cBean\u5b9a\u4e49\u662f\u901a\u8fc7\u4e0d\u540c\u7684\u914d\u7f6e\u7c7b\u5f15\u5165\u7684\uff0c\u914d\u7f6e\u7c7b\u7684\u52a0\u8f7d\u987a\u5e8f\u4f1a\u5f71\u54cd\u5176\u4e2d\u6240\u5b9a\u4e49Bean\u7684\u6ce8\u518c\u987a\u5e8f\u3002<\/p>\n<p><strong>\u90a3\u662f\u4e0d\u662f\u6240\u6709\u7684\u7c7b\u589e\u5f3a\u5728\u6709\u5faa\u73af\u4f9d\u8d56\u65f6\u90fd\u4f1a\u89e6\u53d1UnsatisfiedDependencyException\u5f02\u5e38\u5462\uff1f<\/strong><\/p>\n<p>\u5e76\u4e0d\u662f\uff0c\u6bd4\u5982@Transactional\u5c31\u4e0d\u4f1a\u5bfc\u81f4\u89e6\u53d1UnsatisfiedDependencyException\u5f02\u5e38\u3002\u8ba9\u6211\u4eec\u6df1\u5165\u5206\u6790\u539f\u56e0\u3002<\/p>\n<p>\u6838\u5fc3\u533a\u522b\u5728\u4e8e\u4ee3\u7406\u521b\u5efa\u65f6\u673a\u4e0d\u540c\u3002<\/p>\n<p>@Transactional\u7684\u4ee3\u7406\u65f6\u673a\u5982\u4e0b\uff1a<\/p>\n<pre><code>\/\/ Spring \u4e3a @Transactional \u521b\u5efa\u4ee3\u7406\u7684\u6d41\u7a0b1. \u5b9e\u4f8b\u5316\u539f\u59cb Bean\n2.\u00a0\u653e\u5165\u4e09\u7ea7\u7f13\u5b58\uff08ObjectFactory\uff09\n3.\u00a0\u5f53\u53d1\u751f\u5faa\u73af\u4f9d\u8d56\u65f6\uff0c\u8c03\u7528 ObjectFactory.getObject()\n4.\u00a0\u6b64\u65f6\u5224\u65ad\u662f\u5426\u9700\u8981\u4e8b\u52a1\u4ee3\u7406\uff0c\u5982\u679c\u9700\u8981\u5219\u63d0\u524d\u521b\u5efa\u4ee3\u7406\n5.\u00a0\u5c06\u4ee3\u7406\u5bf9\u8c61\u653e\u5165\u4e8c\u7ea7\u7f13\u5b58\uff0c\u4f9b\u5176\u4ed6 Bean \u4f7f\u7528<\/code><\/pre>\n<p>@Validated\u7684\u4ee3\u7406\u65f6\u673a\uff1a<\/p>\n<pre><code>\/\/ @Validated \u7684\u4ee3\u7406\u521b\u5efa\u5728\u751f\u547d\u5468\u671f\u66f4\u665a\u7684\u9636\u6bb51. \u5b9e\u4f8b\u5316\u539f\u59cb Bean\n2.\u00a0\u653e\u5165\u4e09\u7ea7\u7f13\u5b58\uff08ObjectFactory\uff09\n3.\u00a0\u5f53\u53d1\u751f\u5faa\u73af\u4f9d\u8d56\u65f6\uff0c\u8c03\u7528 ObjectFactory.getObject()\n4.\u00a0 \u274c \u95ee\u9898\uff1a\u6b64\u65f6 @Validated \u7684\u4ee3\u7406\u8fd8\u672a\u521b\u5efa\uff01\n5.\u00a0\u5176\u4ed6 Bean \u62ff\u5230\u7684\u662f\u539f\u59cb\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u5f02\u6b65\u4ee3\u7406\u5bf9\u8c61<\/code><\/pre>\n<p>\u95ee\u9898\u6839\u6e90\uff1a@Transactional\u7684\u4ee3\u7406\u589e\u5f3a\u662f\u5728\u4e09\u5c42\u7f13\u5b58\u751f\u6210\u65f6\u89e6\u53d1\u7684\uff0c\u00a0@Validated\u7684\u589e\u5f3a\u662f\u5728\u521d\u59cb\u5316bean\u540e\u901a\u8fc7\u540e\u7f6e\u5904\u7406\u5668\u505a\u7684\u4ee3\u7406\u589e\u5f3a\u3002<\/p>\n<h2>3.3 \u89e3\u51b3\u65b9\u6848<\/h2>\n<p><strong>\u77ed\u671f\u65b9\u6848<\/strong><\/p>\n<ul>\n<li>\u79fb\u9664SpuCheckDomainServiceImpl\u7c7b\u4e0a\u7684Validated\u6ce8\u89e3<\/li>\n<li>@lazy \u89e3\u8026<\/li>\n<li>\n<ul>\n<li>\u539f\u7406\u662f\u53d1\u73b0\u6709@lazy 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=\u00a0&quot;circular.dependency.analysis.enabled&quot;, havingValue =\u00a0&quot;true&quot;)\npublic\u00a0class\u00a0TimingCircularDependencyHandler\u00a0extends\u00a0AbstractNotifyHandler&lt;NotifyData&gt;\n\u00a0 \u00a0\u00a0implements\u00a0ApplicationContextAware,\u00a0BeanFactoryAware\u00a0{\n\u00a0 \u00a0\u00a0\n\u00a0 \u00a0\u00a0@Override\n\u00a0 \u00a0\u00a0public\u00a0Boolean\u00a0handler(NotifyData data) {\n\u00a0 \u00a0 \u00a0 \u00a0 dependencyGraph =\u00a0new\u00a0HashMap&lt;&gt;();\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0handleContextRefresh();\u00a0\/\/ \u89e6\u53d1\u4f9d\u8d56\u56fe\u6784\u5efa\u4e0e\u68c0\u6d4b\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0return\u00a0Boolean.TRUE;\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\n\u00a0 \u00a0\u00a0private\u00a0void\u00a0buildDependencyGraph() {\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ \u904d\u5386\u6240\u6709Bean\uff0c\u89e3\u6790\u5176\u4f9d\u8d56\u5173\u7cfb\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ \u652f\u6301\uff1a\u6784\u9020\u5668\u3001\u5b57\u6bb5\u3001\u65b9\u6cd5\u3001depends-on\n\u00a0 \u00a0 }\n\u00a0 \u00a0\u00a0\n\u00a0 \u00a0\u00a0private\u00a0void\u00a0detectCircularDependencies() {\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ \u4f7f\u7528DFS\u68c0\u6d4b\u73af\uff0c\u8bb0\u5f55\u6240\u6709\u5faa\u73af\u8def\u5f84\n\u00a0 \u00a0 \u00a0 \u00a0\u00a0\/\/ \u8f93\u51fa\u793a\u4f8b\uff1a\u5faa\u73af\u4f9d\u8d561: A -&gt; B -&gt; C -&gt; A\n\u00a0 \u00a0 }\n}<\/code><\/pre>\n<h2>\u56db\u3001\u603b\u7ed3<\/h2>\n<p>\u5faa\u73af\u4f9d\u8d56\u66b4\u9732\u4e86\u4ee3\u7801\u7ed3\u6784\u7684\u8bbe\u8ba1\u7f3a\u9677\u3002\u7406\u8bba\u4e0a\u5e94\u901a\u8fc7\u5206\u5c42\u548c\u62bd\u8c61\u6765\u907f\u514d\uff0c\u4f46\u5728\u590d\u6742\u7684\u4e1a\u52a1\u4ea4\u4e92\u4e2d\u4ecd\u96be\u4ee5\u675c\u7edd\u3002\u867d\u7136Spring\u5229\u7528\u4e09\u7ea7\u7f13\u5b58\u7b49\u673a\u5236\u9ed8\u9ed8\u89e3\u51b3\u4e86\u8fd9\u4e00\u95ee\u9898\uff0c\u4f7f\u7a0b\u5e8f\u5f97\u4ee5\u8fd0\u884c\uff0c\u4f46\u8fd9\u7edd\u4e0d\u5e94\u662f\u61c8\u6020\u8bbe\u8ba1\u7684\u501f\u53e3\u3002\u6211\u4eec\u66f4\u5e94\u606a\u5b88\u8bbe\u8ba1\u539f\u5219\uff0c\u4ece\u6e90\u5934\u89c4\u907f\u5faa\u73af\u4f9d\u8d56\uff0c\u6784\u5efa\u6e05\u6670\u3001\u5065\u5eb7\u7684\u67b6\u6784\u3002<\/p>\n<p><strong>\u5f80\u671f\u56de\u987e<\/strong><\/p>\n<p>1.\u00a0Apex AI\u8f85\u52a9\u7f16\u7801\u52a9\u624b\u7684\u8bbe\u8ba1\u548c\u5b9e\u8df5\uff5c\u5f97\u7269\u6280\u672f<\/p>\n<p>2.\u00a0\u4ece JSON \u5b57\u7b26\u4e32\u5230 Java \u5bf9\u8c61\uff1aFastjson 1.2.83 \u5168\u7a0b\u89e3\u6790\uff5c\u5f97\u7269\u6280\u672f<\/p>\n<p>3.\u00a0\u7528\u597d TTL Agent \u4e0d\u8e29\u96f7\uff1a\u907f\u5f00\u5185\u5b58\u6cc4\u9732\u4e0eCPU 100%\u4e24\u5927\u6838\u5fc3\u5751\uff5c\u5f97\u7269\u6280\u672f<\/p>\n<p>4.\u00a0\u7ebf\u7a0b\u6c60ThreadPoolExecutor\u6e90\u7801\u6df1\u5ea6\u89e3\u6790\uff5c\u5f97\u7269\u6280\u672f<\/p>\n<p>5.\u00a0\u57fa\u4e8e\u6d4f\u89c8\u5668\u6269\u5c55 API Mock \u5de5\u5177\u5f00\u53d1\u63a2\u7d22\uff5c\u5f97\u7269\u6280\u672f<\/p>\n<p>\u6587 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[&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10021044","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10021044"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021044\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10021044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10021044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10021044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}